fallback: translate: call llvm.experimental.constrained.lround.i32.f16

Run:explore-bc8218b282-20261015-075519
Kind:fallback
Category:translate: call llvm.experimental.constrained.lround.i32.f16
Occurrences:24 in 8 configs, 2 test files
Snippet from:zfh-half-intrinsics-strict.ll @lround_f16 via llvm-extract
Config:-mtriple=riscv32 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation
Local check:reproduces at bc8218b282
Compiler Explorer:not uploaded (over --godbolt-limit or disabled)

Snippet:

; Function Attrs: nounwind strictfp
define i32 @lround_f16(half %a) #0 {
  %1 = call i32 @llvm.experimental.constrained.lround.i32.f16(half %a, metadata !"fpexcept.strict") #2
  ret i32 %1
}

; Function Attrs: nocallback nofree nosync nounwind strictfp willreturn memory(inaccessiblemem: readwrite)
declare i32 @llvm.experimental.constrained.lround.i32.f16(half, metadata) #1

attributes #0 = { nounwind strictfp }
attributes #1 = { nocallback nofree nosync nounwind strictfp willreturn memory(inaccessiblemem: readwrite) }
attributes #2 = { strictfp }

Reproduce:

llc -mtriple=riscv32 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation -global-isel -global-isel-abort=2 -pass-remarks-missed=gisel.* snippet.ll -o -
llc -mtriple=riscv32 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation -global-isel=0 snippet.ll -o -

Local llc output:

remark: <unknown>:0:0: unable to translate instruction: call llvm.experimental.constrained.lround.i32.f16: '  %1 = call i32 @llvm.experimental.constrained.lround.i32.f16(half %a, metadata !"fpexcept.strict") #2' (in function: lround_f16)
warning: Instruction selection used fallback path for lround_f16

Occurrences (24):

InputFunctionConfig
zfh-half-intrinsics-strict.lllround_f16-mtriple=riscv32 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation
zfh-half-intrinsics-strict.lllround_f16-mtriple=riscv32 -mattr=+zdinx -mattr=+zhinx -verify-machineinstrs -target-abi ilp32
zfh-half-intrinsics-strict.lllround_f16-mtriple=riscv32 -mattr=+zfh -verify-machineinstrs -target-abi ilp32f -disable-strictnode-mutation
zfh-half-intrinsics-strict.lllround_f16-mtriple=riscv32 -mattr=+zhinx -verify-machineinstrs -target-abi ilp32 -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.lllround_f16-mtriple=riscv32 -mattr=+d -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.lllround_f16-mtriple=riscv32 -mattr=+zdinx -mattr=+zhinxmin -verify-machineinstrs -target-abi ilp32
zfhmin-half-intrinsics-strict.lllround_f16-mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.lllround_f16-mtriple=riscv32 -mattr=+zhinxmin -verify-machineinstrs -target-abi ilp32 -disable-strictnode-mutation
zfh-half-intrinsics-strict.0c5f05e9f2.ll (mutant of zfh-half-intrinsics-strict.ll)lround_f16-mtriple=riscv32 -mattr=+zfh -verify-machineinstrs -target-abi ilp32f -disable-strictnode-mutation
zfh-half-intrinsics-strict.1b6af65cf9.ll (mutant of zfh-half-intrinsics-strict.ll)lround_f16-mtriple=riscv32 -mattr=+zdinx -mattr=+zhinx -verify-machineinstrs -target-abi ilp32
zfh-half-intrinsics-strict.543dfe4fd6.ll (mutant of zfh-half-intrinsics-strict.ll)lround_f16-mtriple=riscv32 -mattr=+zdinx -mattr=+zhinx -verify-machineinstrs -target-abi ilp32
zfh-half-intrinsics-strict.66adaaed46.ll (mutant of zfh-half-intrinsics-strict.ll)lround_f16-mtriple=riscv32 -mattr=+zhinx -verify-machineinstrs -target-abi ilp32 -disable-strictnode-mutation
zfh-half-intrinsics-strict.8c073c3309.ll (mutant of zfh-half-intrinsics-strict.ll)lround_f16-mtriple=riscv32 -mattr=+zhinx -verify-machineinstrs -target-abi ilp32 -disable-strictnode-mutation
zfh-half-intrinsics-strict.98659546cc.ll (mutant of zfh-half-intrinsics-strict.ll)lround_f16-mtriple=riscv32 -mattr=+zfh -verify-machineinstrs -target-abi ilp32f -disable-strictnode-mutation
zfh-half-intrinsics-strict.ef7e9ae3ef.ll (mutant of zfh-half-intrinsics-strict.ll)lround_f16-mtriple=riscv32 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation
zfh-half-intrinsics-strict.fad6d079e2.ll (mutant of zfh-half-intrinsics-strict.ll)lround_f16-mtriple=riscv32 -mattr=+d -mattr=+zfh -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.0692eb2c21.ll (mutant of zfhmin-half-intrinsics-strict.ll)lround_f16-mtriple=riscv32 -mattr=+zdinx -mattr=+zhinxmin -verify-machineinstrs -target-abi ilp32
zfhmin-half-intrinsics-strict.18be13d6f4.ll (mutant of zfhmin-half-intrinsics-strict.ll)lround_f16-mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.4399f36d8c.ll (mutant of zfhmin-half-intrinsics-strict.ll)lround_f16-mtriple=riscv32 -mattr=+d -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.4cb74453c1.ll (mutant of zfhmin-half-intrinsics-strict.ll)lround_f16-mtriple=riscv32 -mattr=+d -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32d -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.afa1a4a95f.ll (mutant of zfhmin-half-intrinsics-strict.ll)lround_f16-mtriple=riscv32 -mattr=+zhinxmin -verify-machineinstrs -target-abi ilp32 -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.b5f2de804a.ll (mutant of zfhmin-half-intrinsics-strict.ll)lround_f16-mtriple=riscv32 -mattr=+zhinxmin -verify-machineinstrs -target-abi ilp32 -disable-strictnode-mutation
zfhmin-half-intrinsics-strict.d9bbb4225b.ll (mutant of zfhmin-half-intrinsics-strict.ll)lround_f16-mtriple=riscv32 -mattr=+zdinx -mattr=+zhinxmin -verify-machineinstrs -target-abi ilp32
zfhmin-half-intrinsics-strict.e2fae7a962.ll (mutant of zfhmin-half-intrinsics-strict.ll)lround_f16-mtriple=riscv32 -mattr=+zfhmin -verify-machineinstrs -target-abi ilp32f -disable-strictnode-mutation

Generated 2026-10-15 08:05 UTC.